--- title: "U-Line error code Evap T Open" description: "U-Line error code Evap T Open: The evaporator thermistor circuit is open. Which machines can actually raise it, where the number lives on this make, and what to do next." url: "https://ulinemiami.support/error-codes/error-code-evap-t-open/" date_modified: "2026-08-30" Appliance type: "Beverage centers, Undercounter refrigerators, Wine coolers" --- # U-Line error code Evap T Open ### What Evap T Open means, in the maker’s own words The evaporator thermistor circuit is open. This is the sensor defrost timing is set by, not the one that reads the compartment, which is why the symptom that arrives with it is frost rather than a warm cabinet. Unlike the E numbers on the rest of this make, this one is shown to you: the 3000 Series monitors its inputs continuously and puts the notification on the user interface rather than only into a service log. It is in the service guide’s diagnosis list and not in the customer table, so it is one an owner meets quoted by a technician rather than printed in the manual. ### Quoted rather than interpreted > Evap T Open — Inspect evaporator thermistor connection. Replace if necessary. Inspect main control wire harness for splits or breaks. From the service diagnosis guide, 3000 Series User Guide, in a User Guide & Service Manual downloaded from U-Line’s own site. Nothing on this page is decoded beyond what that sentence says. ### Where this notification actually lives On your display, which on this make is the exception rather than the rule. The 3000 Series does not use the E numbers at all: it watches its inputs continuously and writes the notification on the user interface in plain words, so there is no hidden log to open and no key to hold. Every other U-Line in this catalog does the opposite — it logs the number in memory and shows you nothing but the door. If you are reading a phrase rather than a number, this is the series you own. ### What to do about it - Inspect the evaporator thermistor connection and replace it if necessary — the service guide’s first step. - Then the harness: inspect the main control wire harness for splits or breaks and repair cut cabling. - Expect frost. With no evaporator sensor the control cannot time a defrost properly, so ice builds on the coil behind the rear panel and airflow falls away before the cabinet temperature moves at all. - If frost has already built up, clearing the error does not clear the ice — the coil has to be defrosted as its own step, or the unit comes back with the same complaint a week later. ### Where this goes next The job this usually becomes is [diagnostic visit](/services/diagnostic-visit/), and every one of those pages carries a starting figure and the reasons that move it. If it turns out to be nothing — and on this make a real share of these are modes rather than problems — the visit ends there and you pay the diagnostic and nothing else, or call [(305) 851-2207](tel:+13058512207) and describe what the display is doing before booking anything. **u line evap t open error** names a notification the 3000 Series puts on the display itself, which is what makes it different from every other number this maker logs. 3000 Series only — this series does not use the E numbers What this one means What Evap T Open means, in the maker’s own words The evaporator thermistor circuit is open. This is the sensor defrost timing is set by, not the one that reads the compartment, which is why the symptom that arrives with it is frost rather than a warm cabinet. Unlike the E numbers on the rest of this make, this one is shown to you: the 3000 Series monitors its inputs continuously and puts the notification on the user interface rather than only into a service log. It is in the service guide’s diagnosis list and not in the customer table, so it is one an owner meets quoted by a technician rather than printed in the manual. Quoted rather than interpreted Evap T Open — Inspect evaporator thermistor connection. Replace if necessary. Inspect main control wire harness for splits or breaks. From the service diagnosis guide, 3000 Series User Guide, in a User Guide & Service Manual downloaded from U-Line’s own site. Nothing on this page is decoded beyond what that sentence says. Where this notification actually lives On your display, which on this make is the exception rather than the rule. The 3000 Series does not use the E numbers at all: it watches its inputs continuously and writes the notification on the user interface in plain words, so there is no hidden log to open and no key to hold. Every other U-Line in this catalog does the opposite — it logs the number in memory and shows you nothing but the door. If you are reading a phrase rather than a number, this is the series you own. What to do about it Inspect the evaporator thermistor connection and replace it if necessary — the service guide’s first step. Then the harness: inspect the main control wire harness for splits or breaks and repair cut cabling. Expect frost. With no evaporator sensor the control cannot time a defrost properly, so ice builds on the coil behind the rear panel and airflow falls away before the cabinet temperature moves at all. If frost has already built up, clearing the error does not clear the ice — the coil has to be defrosted as its own step, or the unit comes back with the same complaint a week later. Where this goes next The job this usually becomes is diagnostic visit, and every one of those pages carries a starting figure and the reasons that move it. If it turns out to be nothing — and on this make a real share of these are modes rather than problems — the visit ends there and you pay the diagnostic and nothing else, or call [(305) 851-2207](tel:+13058512207) and describe what the display is doing before booking anything. u line evap t open error names a notification the 3000 Series puts on the display itself, which is what makes it different from every other number this maker logs. --- **[Read full article: U-Line error code Evap T Open](https://ulinemiami.support/error-codes/error-code-evap-t-open/)**